tisdag 6 juli 2010

Turbulence as Breakdown by Instability

In previous posts I have argued that backradiation is unphysical because it is unstable and thus will break down if attempted. Backradiation acts like an escalating war with each attack countered by another attack, like in the Iceandic sagas of revenge, until complete destruction.

Turbulence is an example of breakdown by instability, where velocity gradients are sharpened

into violent kinetic motion which eventually is smashed by a police of dissipation into small scale motion perceived as heat.

The instability of turbulent flow also shows up as a capability of creating something out of nothing, namely vorticity or swirling flow out of a swirlfree flow, as when a swirling tornado is created from still air (without a big fan).